EP 1505852 A4 20100127 - PIEZOELECTRIC SPEAKER, SPEAKER SYSTEM EMPLOYING IT, AND ELECTRONIC APPARATUS EMPLOYING PIEZOELECTRIC SPEAKER
Title (en)
PIEZOELECTRIC SPEAKER, SPEAKER SYSTEM EMPLOYING IT, AND ELECTRONIC APPARATUS EMPLOYING PIEZOELECTRIC SPEAKER
Title (de)
PIEZOELEKTRISCHER LAUTSPRECHER, LAUTSPRECHERSYSTEM DAMIT UND ELEKTRONISCHE VORRICHTUNG MIT EINEM PIEZOELEKTRISCHEN LAUTSPRECHER
Title (fr)
HAUT-PARLEUR PIEZO-ELECTRIQUE, SYSTEME DE HAUT-PARLEUR UTILISANT UN TEL HAUT-PARLEUR, ET APPAREIL ELECTRONIQUE METTANT EN OEUVRE UN HAUT-PARLEUR PIEZO-ELECTRIQUE
Publication
Application
Priority
- JP 0315715 W 20031209
- JP 2003004452 A 20030110
Abstract (en)
[origin: EP1505852A1] A piezoelectric loudspeaker includes: a diaphragm; a first piezoelectric material provided in a first area of the diaphragm; and a second piezoelectric material provided in a second area of the diaphragm different from the first area. The second area has a sound reproduction band different from that of the first area. This piezoelectric loudspeaker has a wide reproduction frequency range. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/26 (2006.01); H04R 3/12 (2006.01); H04R 17/00 (2006.01)
CPC (source: EP US)
H04R 3/12 (2013.01 - EP US); H04R 17/00 (2013.01 - EP US)
Citation (search report)
- [A] JP H04140999 A 19920514 - MURATA MANUFACTURING CO
- [A] JP S61158299 A 19860717 - SONY CORP
- See references of WO 2004064449A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1505852 A1 20050209; EP 1505852 A4 20100127; AU 2003289265 A1 20040810; CN 1692677 A 20051102; JP 2004221742 A 20040805; JP 3896967 B2 20070322; US 2005213785 A1 20050929; WO 2004064449 A1 20040729
DOCDB simple family (application)
EP 03777386 A 20031209; AU 2003289265 A 20031209; CN 200380100418 A 20031209; JP 0315715 W 20031209; JP 2003004452 A 20030110; US 51189004 A 20041019